Deep See By Aqua Lung Squeeze Lock Knife and Sheath 3 blade, overall length 6.5 304 series stainless steel or High Grade Beta Alloy Titanium Patented locking mechanism securely locks knife in sheath, but releases easily with a squeeze of the handle Variable mounting optino: Stainless Steel barnacle nuts & bolts are included for mounting through fabric or for installation on Buoyancy Compensators with knife grommets. Hose mounting straps are included for mounting to the BC inflator hose. Locking belt clip is integrated into sheath for attaching knife to webbing. Sheath has molded strap slots for use with optional rubber leg straps.